vxlan: use pskb_network_may_pull() for transmit path header pulls

{
  "id": "afe110be70086b159bdaee627347854dc50cc7e6979e0b61cf2077667e110cef",
  "url": "https://osv.dev/vulnerability/CVE-2026-74474",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "vxlan: use pskb_network_may_pull() for transmit path header pulls",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() for transmit path header pulls In vxlan_xmit(), arp_reduce(), and vxlan_mdb_entry_skb_get(), pskb_may_pull() was being called to verify the availability of network layer headers (ARP, IPv6/ND, IP/IPv6 MDB keys). However, during transmit skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, len) only checks len bytes from skb->data rather than skb_network_offset(skb) + len, which can leave part of the network header in non-linear frags. Replace these remaining pskb_may_pull() calls with pskb_network_may_pull() to properly account for the MAC header offset.",
    "evidence": "osv:CVE-2026-74474",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.188",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.153",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.105",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-74474",
      "aliases": [
        "CVE-2026-74474"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e4f67addf158f98f8197e08974966b18480dc751"
                },
                {
                  "fixed": "371425d4be7795e9158388af9eee0201e6047410"
                },
                {
                  "fixed": "bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4"
                },
                {
                  "fixed": "6146901881f09ef063eb34ad389f63231f8486f5"
                },
                {
                  "fixed": "94dee751aad627b3645d424b5d0c736d394573e9"
                },
                {
                  "fixed": "7076a34b6e33315dc160b4612bfea1c597495585"
                },
                {
                  "fixed": "b9553558b48db54ac9273e6b98d7263ef5c1a329"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74474.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.8.0"
                },
                {
                  "fixed": "6.1.188"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.153"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.105"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.44"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74474.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.184340961Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/371425d4be7795e9158388af9eee0201e6047410",
        "https://git.kernel.org/stable/c/6146901881f09ef063eb34ad389f63231f8486f5",
        "https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585",
        "https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9",
        "https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329",
        "https://git.kernel.org/stable/c/bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74474.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74474",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74474.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74474",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519962,
  "published_at": "2026-08-15T12:27:10.037+00:00"
}